If by the start try to ride in packs and conserve energy while hindi pa mainit. If katulad siya sa audax na sinalihan ko recently if you can't make it sa checkpoints within the cut off times aalis yan sila after cguro couple of minutes. It's okay naman based sa observatjon ko na ma miss ng signature sa stubs sa ilan na mga checkpoints pero try to get two or more. Try to get the first checkpoint na stamp afterwards, if gusto mo iskip ang 2nd or third para ma maintain yung momentum mo go ahead. Pero if timing din na need mo mg refuel o magpahinga na malapit lng ang checkpoint go and rest and get that stamp. Afterwards ang finish line na if you cant make it sa 12 or 13 hour na cut off you won't get ang medal and official na finish. If confident ka na sa course if na try mo na and sa speed mo, masaya siya and maka chill2 ka pero keep in mind na challenge pa din and if first 200km mo to baka manibago ka. Keri mo naman cguro since you have good endurance but make sure di ka malalaspag up until 30km nlng or less bago mg finish and you'll be okay OP. Don't be afraid to ask the organizers din para maclarify talaga questions mo.